JPS602418Y2 - liquid fuel burner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a pot-type liquid fuel combustion device.

As shown in FIG. 1, liquid fuel in a conventional pot-type liquid fuel combustion device is injected from a fuel tank 1 through an oil controller 2 and a fuel supply pipe 3 into an evaporation tray 4 at the bottom of the pot.
It is ignited by an igniter (not shown).

After ignition, the pot is heated by the combustion heat, and the fuel is vaporized and combusted by that heat, so it takes a long time to vaporize all the liquid fuel supplied to the evaporation dish at the bottom of the pot. The disadvantage was that it was slow.

Furthermore, since the burner section and the fuel supply pipe 3 are connected to each other, the fuel supply section is subject to thermal influence from the burner section, and there is a drawback that the fuel supply pipe 3 is easily clogged due to deterioration of the kerosene or the like.

The present invention has been made to eliminate the above-mentioned drawbacks, and is designed to speed up the start-up of combustion and to make the fuel supply section less susceptible to the effects of heat from the burner section.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 2, 5 is a nozzle having an injection port 6 that injects pressurized liquid fuel as a thin linear flow, and is supplied to a fuel tank 9 through a fuel supply pipe 7 via a fuel pressure pump 8. It's communicating.

Reference numeral 10 denotes liquid fuel injected as a thin, linear, high-velocity stream from the nozzle 5.

(hereinafter simply referred to as fuel) On the other hand, 11 is the injected fuel 10
It is a pot-type burner that burns fuel, and a fuel supply cylindrical body 12 that communicates the inside of the burner with the outside is attached to the side of the pot 1.
3 has a collision body 14 that causes the fuel 10 to collide.

Combustion air supply holes 13a and 13b are provided in the side wall of the pot 13.
A mixing ring 15 is provided inside.

Reference numeral 16 denotes a blower fan, which supplies combustion air to a bottomed cylindrical ventilator 18 through a blower path 17 .

The operation in the above structure will be explained.

The liquid fuel pressurized by the fuel pressurizing pump 8 is injected from the nozzle 5 as fuel 10 at high speed, passes through the fuel supply cylindrical body 12 and collides with the collision body 14, and a part of the liquid fuel is atomized. Any unused fuel will drip to the bottom of the pot.

When the high-velocity fuel 10 flies outside the burner 11, it attracts external air into the fuel supply cylinder 12 due to the injection effect due to its viscosity with the air.

Therefore, even if the pressure inside the pot 13 increases, vaporized gas will not flow out from inside the pot in the opposite direction through the cylindrical body 12.

On the other hand, combustion air enters the ventilation body 18 from the ventilation fan 16 via the ventilation path 17, is supplied to the inside of the pot 13 through the combustion air supply hole 13a, mixes with the atomized fuel, and flows into the collision body 14. It is ignited by an ignition device (not shown) around the collision body 14, and combustion starts in the area A around the collision body 14.

If ignition does not occur for some reason, the liquid fuel that collided with the collision body 14 will accumulate at the bottom of the pot 13, but the liquid fuel will not ignite at the air supply hole 13.
Since a is provided on the side wall of the pot above the bottom,
There is no inconvenience that the liquid fuel accumulated at the bottom flows out to the burner 11.

Also, since the air supply hole 13a is above the collision body 14,
The amount of air near section A is not too large and is the amount of air required at the initial stage of combustion, so combustion occurs smoothly near section A at the time of ignition.

Moreover, as the combustion progresses, the combustion heat from the combustion causes the impactor to
4 and the area A around it become high in temperature in a short time, and the fuel 10 that is subsequently supplied vaporizes on the surface of the impactor 14 and the area A around it.

In the combustion in part A, if only the combustion air supplied from the combustion air supply hole 13a is used, the combustion concentration becomes high and incomplete combustion occurs, and the flame extends upwards in the pot, but the combustion air supplied from the combustion air supply hole 13b increases. When air is supplied, complete combustion occurs in part B to form a flame.

Due to the radiation and heat transfer of combustion heat caused by combustion in parts A and B, the evaporation tray at the bottom of the bot 13 becomes high temperature, collides with the impactor 14, and the fuel that had been dripping without being atomized or vaporized, When vaporization begins, the combustion air supplied from the combustion air supply hole 13a in the area A around the collision body 14 exceeds the combustion range and combustion becomes impossible.

The combustion air supplied from the combustion air supply hole 13a is
It is used to premix the fuel vaporized around the collision body 14 and in the evaporation pan at the bottom of the bot 13. After mixing in the mixing ring 15, combustion air is supplied from the combustion air supply hole 13b, and the fuel is heated to the B section. A stable flame is formed and complete combustion occurs.

Note that if the air supply hole 13a is provided below the collision body 14, too much air will be supplied near the collision body 14, and A
Ignition and combustion near the area do not go smoothly.

In addition, even if combustion progresses and the amount of vaporization increases, the amount of air is large, so combustion flames are formed near section A, but flames are also formed near section B above, which only makes combustion unstable. Instead, more CO is generated.

Furthermore, since the impacting body is located above the air supply hole 13a, the height of the burner 11 must be increased, causing problems such as the need to increase the size of the burner.

The features of the present invention can be summarized as follows: (1) Since the present invention uses a vaporization combustion method, there is no generation of soot or large combustion noise that occurs due to diffusion combustion, unlike in the spray method.

(2) Since the present invention injects liquid fuel in the form of a thin linear stream, it is immediately atomized by the collision body, so combustion can begin instantly upon ignition.

This heat heats the colliding body to form a vaporization surface, but since the liquid fuel is in the form of a thin linear flow, the colliding body can be small and as a result, its heat capacity is small, so the temperature rises in a very short time after the combustion starts. The fuel can be vaporized.

Therefore, the rise time is extremely short compared to the pot gasification method, which is a conventional vaporization combustion method.

Furthermore, in the case of a gun type with a fast rise time, the nozzle is complicated and 15
Although it is extremely difficult to achieve a small heat capacity of 000 Kcal/h or less, this method can easily achieve a small capacity.

(3) Since the present invention injects liquid in a straight line, the structure of the nozzle is simple, and the colliding body that vaporizes the fuel can be made small, and it can be easily and continuously carried out without using complicated rotating bodies. This enables stable fuel vaporization, and the vaporization device is small and trouble-free, resulting in stable combustion.

(4) In conventional combustion methods, the burner section and fuel supply section are close to each other or are connected to each other, so they are susceptible to thermal effects from the burner section, requiring measures for insulation, leading to various troubles. .

In this invention, since fuel is supplied to the burner section as a thin linear fuel from the nozzle which is the fuel supply section, the fuel supply section and the burner section can be thermally separated, and there is little thermal influence from the burner section, so it is necessary to take heat insulation measures. is almost unnecessary.

(5) Since this invention supplies pressurized fuel to the nozzle as a thin linear fuel to the burner, a fuel on/off valve such as a solenoid valve is installed in the fuel supply path to the nozzle to shut off the fuel. It is possible to stop combustion instantly, and instant fire extinguishment is possible in earthquake emergencies.

(6) This invention provides a fuel supply cylindrical body that communicates between the inside and outside of the burner, and allows the flow of liquid fuel to fly into the burner through this, so the vaporized gas inside the burner is absorbed into the cylinder by the injection effect. There is no backflow within the body.

(7) In the present invention, the pot is of an open-top type, with multiple rows of combustion air supply holes provided on the circumferential side wall, and the collision body is provided below the bottom row of air supply holes, and the liquid fuel is supplied from the side wall. Since the flow is allowed to flow in, even if the liquid fuel that hits the collision body does not vaporize or ignite and accumulates at the bottom, there is the inconvenience that the liquid fuel will flow out from the above-mentioned supply hole provided in the pot. does not occur.

Furthermore, since the amount of air near the A section is the amount of air required at the initial stage of combustion, combustion at the time of ignition is smooth.

Furthermore, as the combustion progresses and the amount of vaporization increases, the flame moves upwards, forming a stable flame in section B, resulting in complete combustion.

As mentioned above, this liquid fuel combustion device inherits the features of the conventional combustion method, and has a simple structure that solves most of the drawbacks of the conventional method, and is extremely stable, safe, and effective.
A new kind of combustion can be realized.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional liquid fuel combustion device, and FIG. 2 is a sectional view of a liquid fuel combustion device showing an embodiment of the present invention, in which 5 is a nozzle, 12 is a fuel supply cylinder, 14 is a colliding object.

Claims (1)

[Claim for Utility Model Registration] A burner equipped with an open-top pot with multiple rows of combustion air supply holes in the peripheral side wall, and a pressurized liquid fuel located outside the burner in a thin straight line. a nozzle having an injection port that sprays the liquid fuel as a high-velocity stream; A fuel supply cylindrical body provided in the pot of the burner, installed below the lowest row of the combustion air supply holes, collides the flow of the liquid fuel into which it is atomized or vaporized. A liquid fuel combustion device comprising: a colliding body that causes a collision to occur;